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author | Nick Terrell <terrelln@fb.com> | 2022-10-21 16:00:35 -0700 |
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committer | Nick Terrell <terrelln@fb.com> | 2022-10-21 16:00:35 -0700 |
commit | 14e77332e74603efab8347c89d3cda447c3b97c9 (patch) | |
tree | b7b8a48f4f75590266a763c52e072dda32b228ae /kernel/irq/msi.c | |
parent | 88a309465b3f05a100c3b81966982c0f9f5d23a6 (diff) | |
parent | 1d61754caa8c69f566504e63c8b3f3a2df0954c8 (diff) |
Merge branch 'main' into zstd-next
Diffstat (limited to 'kernel/irq/msi.c')
-rw-r--r-- | kernel/irq/msi.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index 2bdfce5edafd..a9ee535293eb 100644 --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -818,6 +818,21 @@ static int msi_init_virq(struct irq_domain *domain, int virq, unsigned int vflag irqd_clr_can_reserve(irqd); if (vflags & VIRQ_NOMASK_QUIRK) irqd_set_msi_nomask_quirk(irqd); + + /* + * If the interrupt is managed but no CPU is available to + * service it, shut it down until better times. Note that + * we only do this on the !RESERVE path as x86 (the only + * architecture using this flag) deals with this in a + * different way by using a catch-all vector. + */ + if ((vflags & VIRQ_ACTIVATE) && + irqd_affinity_is_managed(irqd) && + !cpumask_intersects(irq_data_get_affinity_mask(irqd), + cpu_online_mask)) { + irqd_set_managed_shutdown(irqd); + return 0; + } } if (!(vflags & VIRQ_ACTIVATE)) |